Pressure apparatus for the drawing



Jan. 30, 1934. F. CASABLANCAS 1,944,966

PRESSURE APPARATUS FOR THE DRAWING MECHANISM OF TEXTILE MACHINERY Filed Aug. 20, 1952 2 Sheets-Sheet l Jan. 30, 1934. F. CASABLANCAS 1,944,965

PRESSURE APPARATUS FOR THE DRAWING MECHANISM OF TEXTILE MACHINERY 2 Sheets-Shefi 2 Filed Aug. 20, 1952 Patented Jan. 30, 1934 PRESSURE APPARATUS FOR THE DRAWING- MECHANISM OF TEXTILE MACHINERY Fernando Casablancas, Sabadell, Spain Application August 20, 1932, Serial No. 629,713, and in Spain May 17, 1932 Claims. (Cl. 19-135) plications and in this case also the apparatus can 5 This invention consists of an improvement in or. modification of the mechanism described and claimed in my co-pending applications Serial No. 583,757 and Serial No. 618,529.

Said co-pending applications relate to pressure apparatus applicable to the mechanisms for drawing textile rovings, for the purpose of loading the cylinders of the said mechanisms and in which there is employed, for the purpose of loading the pressuretransmitting connecting rod, a system of two levers which rest one on the other with their ends in contact, in such a manner" that the rear lever receives the action of the weight and transmits it to the front lever and the latter, in turn, transmits it to the pressuretransmitting connecting rod.

The shape and arrangement of these two le- .vers are such that when they are in the working position the force of the weight is transmitted from the rear lever to the front lever and from the latter to thepressure-transmitting connecting rod and, on the other hand, if the front end of the front lever be raised, the pressure-transmitting connecting rod being pulled upwards, this front lever causes the rear lever to rotate and both remain fixed in such a position that the action of the weight is not transmitted to the drawing mechanism.

A modification of this pressure apparatus comprises a small roller or rolling member interposed between and in contact with the ends of the two levers and the weight is substituted by a spring. This improvement, combined with the employment of a frame which is mounted on a bar longitudinal to the spinning machine and which frame carries the axles of rotation of the two levers and at the same time serves as a fixed point of support for the spring, produces the result that there is obtained an eminently practical mechanism that is easy to apply to all spinning or preparing machines. I

The subject matter of the present invention is a further modification in the pressure apparatus of this kind by means of which the same result is obtained with a different and simpler construction and to this end the invention consists in having only one of the levers pivoted to the fixed frame whilst the second lever is pivoted to the first lever and rests on the fixed frame with or without the interposition of a rolling member. The fixed frame at the same time serves as a point of support for the spring which works the first of the said levers.

This pressure apparatus works in a similar manner to that described in said co-pending apbe arranged in such a manner that, when the pressure-transmitting connecting rod is pulled upwards, the apparatus remains blocked without loading the cylinders and when the pressuretransmitting connecting rod is again pushed downwards the apparatus is freed and again loads the cylinders.

'Two embodiments of the pressure apparatus of my invention are shown by way of example by the accompanying drawings.

Figures 1 and 2 represent a first embodiment of this apparatus in the working position and in the fixed position respectively.

Figures 3 and 4 represent a second embodiment in similar positions.

In the constructional form of Figures 1 and 2, the mechanism comprises, as in the cited 00- pending applications, a frame 1 which is mounted on a bar 2 to which it is suitably fixed so that it cannot rotate, and this frame 1 carries in the top part an axle or pin 3 about which rotates the lever 4 which, with its rear end 5, rests on the case 6, that contains the spring, in the same manner as in the case of my co-pending application Serial No. 618,529. This case, in turn, rests on an extension 14 of the frame 1, which extension serves as a fixed point of support.

The lever 4 carries in its front end the pin '7 that serves as an axle for the rotation of the front lever which, in this form of construction, consists of a piece 8 which, at its front end, forms the hook 9 in which engages the pressure-transmitting connecting rod 10, Whilst with its rear end, it rests, through the intermediary of a roller or rolling element 11, on the fixed frame 1. The difference between this construction and that described in my co-pending application Serial No. 618,529 is that the front lever 8 is not pivoted to the frame 1 and resting on the lever 4, but it is pivoted to this lever 4 and rests on the frame 1. The surface 13 of the front lever 8 and the surface 12 of the frame are given the shapes that are suitable for the roller 11 to roll simultaneously on both surfaces during the movement of the lever 8.

In the normal working position represented in Figure 1, the action of the spring 6 is transmitted by means of the rear lever 4 to the front lever 8, and the latter, resting on the fixed frame by means of the roller 11, transmits to the connecting rod a downward force which loads the cylinders of the drawing mechanism. When a pull is exerted by hand on the connecting rod 10, for example when the pressure saddle is raised, the connecting rod forces the lever 8 to rock and the latter, bearing on the roller 11, causes the lever 4 to rotate, compressing the spring 6 until the mechanism takes up the position represented in Figure 2, in which the action that the lever 4 exerts on the axle '7 of the lever 8 is neutralized by the point of support 11, 12 and, in this manner, the mechanism remains fixed and the pressure-transmitting connecting rod 10 and the corresponding pressure saddle remain raised without loading the cylinders of the drawing mechanism.

If a downward pressure is then exerted on the pressure saddle or on the connecting rod 10, the latter forces the piece 8 to rock again into the position shown in Figure 1 in which the action of the spring 6 is again transmitted to the connecting rod 10.

In the constructional form represented in Figures 3 and 4, the apparatus likewise comprises a fixed frame 1 which is suitably fixed mounted on a longitudinal bar 2 and forms at its rear part a projection 14 which serves as a support for the spring 6. This frame 1 carries, rotatably mounted on the pin 15, a lever 16 the rear end 5 of which receives the action of the spring 6, and this lever 16 carries the pin 17 which forms the axle for the rotation. of the front lever 18 that, with its front end, forms a hook in which the connecting rod 10 engages.

The rear end of the lever 18 has a fiat part 20 which, in the normal working of the apparatus represented in Figure 3, rolls on a roller 19 fixed to the frame 1; this rear end forms, in continuation of this flat part, a recess 21 of suitable dimensions for the purpose of engaging the roller 19 within it.

During the normal working of the apparatus, the lever 18 rests with its fiat part 20 on the roller 19 and, in this manner, the action of the spring is transmitted by the lever 16 to the lever 18 and, from the latter, to the connecting rod 10. If the connecting rod 10 is pulled upwards, the mecha nism takes up the position represented in Figure 4, in which the recess 21 of the lever 18 engages the roller 19, this lever 18 thus remaining held with the connecting rod 10 raised, without the action of the spring 6 being transmitted to the latter.

If, when the apparatus is in this condition, the pressure--transmitting connecting rod 10 is pushed downwards, the latter acts upon the lever 18 and forces it to rock and to disengage the recess 21 from the roller 19, with the, result that the apparatus returns into the normal working position shown in Figure 3.

I claim:

1. A pressure apparatus for drawing mechanism of textile machinery comprising a fixed frame, a lever pivotally mounted on said frame,

spring means for forcing said lever in one direction, a second lever pivotally mounted on the first lever, a rotatable member carried by the frame to form a seat for one end of the second lever, and a pressure rod coupled to the other end of said second lever for transmitting the pressure exerted by said spring through said levers, the said rod manually operable to move the levers in the reverse direction into inoperative position.

2. A pressure apparatus for drawing mechanism of textile machinery comprising a pressure rod, a frame, means for supporting the frame, a lever pivotally mounted on said frame, spring means for moving said lever in one direction, a second lever pivotally mounted on the first lever and having contact with the frame to exert a downward pressure on the pressure rod, the said pressure rod coupled to the second lever for transmitting said pressure, and stop means carried by the second lever for limiting the movement of the second lever when the rod is raised to hold the levers'in a fixed position.

3. In a pressure apparatus for drawing mechanism of textile machinery comprising a frame having a forwardly and a rearwardly extending flange along its base, means for supporting the frame in fixed position, a lever pivotally mounted on said frame, spring means disposed between said rearward flange and said lever to force the lever in one direction, a second lever having a notched portion terminating in an outwardly projecting lip, means for pivotally mounting the second lever to the first lever with the notched portion in spaced relation to the forwardly extending flange on the frame to form a runway, a roller freely mounted in said runway to provide a contact between the second lever and the frame to permit downward movement of the second lever, and a pressure rod coupled to the second lever for transmitting the downward movement and for providing manually operable means to place the levers in a fixed position.

4:. A pressure apparatus for drawing mechanism of textile machinery comprising a fixed frame, a lever pivotally mounted on said frame, spring means for forcing said lever in one direction, a second lever pivotally mounted on the 115 first lever having a forward and a rearward end portion, a travelling roller for engaging the rearward end of the lever and the fixed frame to permit the second lever to move with the first lever, a pressure rod coupled to the forward end 120 of the second lever for transmitting said movement, and stop means carried by the second lever to limit the gyratory movement of the second lever upon raising the pressure rod whereby the levers are held in a fixed position.

5. A pressure apparatus for drawing mechanism of textile machinery comprising a fixed frame, a lever pivotally mounted on said frame, spring means for forcing said lever in one direction, a second lever pivotally mounted on the first 13f lever to provide a forward and a rearward end portion, the rear end having portions cut away to form notches, a roller pivotally mounted on the fixed frame to engage one of said notches forming a support for the rear end of the second -5.35 lever and permitting the second lever to move downwardly with thefirst lever, and a pressure rod coupled to the second lever to transmit the downward movement, the said rod manually operable to move the second lever to permit the roller to enter another notched portion for holding the levers in a fixed position.

FERNANDO CASABLANCAS. 

